Sewing machine



N. V. CHRRSTENSEN Sept. 27, 1949.

SEWING MACHINE 6 Sheets-Sheet 1 Filed Jan. 15, 1945 INVENTORT NORMA/V KC'Hfi/S TEA/SEA.

4 rraa/vzy N. v. CHRISTENSEN SEWING MACHINE Sept. 27, 1949 6 Sheets-Sheet 2 Filed Jan. 13, 1945 INVENTOR. NORMA/V V. CHRISTI $55M Sept. 27, 1949. N. v. CHRISTENSEN 2,483,035

I SEWING MACHINE I Filed Jan. 13, 1945 6 Sheets-Sheet s INVENTOR. air/WAN MCW/f/STE/VSE/V.

Sept. 27, 1949. N. v. CHRISTENSEN 2,483,036

SEWING MACHINE Filed Jan. 13, 1945 e Sheets-Sheet 4 p 1949. N. v. CHRISTENSEN 2,483,036

SEWING MACHINE Filed Jan. 13, 1945 6 Shets-Sheet 5 I INVENTOR. WORM/1N MCHfi/STE/VSE/M Patented Sept. 27, 1949 UNITED STATES PATENT OF F [CE I 2,483,036 i Y SEWING MACHINE Norman V. Christensen, Chicago, Ill., assignor to Union Special Machine Company, Chicago, 111., a corporation of Illinois Application January I3, 1945, Serial No. 572,595

This invention relates to an improved sewing machine construction and more particularly to a machine of the type having a base with a vertically rising standard adjacent'one end and an overhanging arm projecting from the standard and extending over thework supporting surface of the base.

An object of the invention has been to provide a machine of the above indicated character, which is of simple, sturdy and compact construction and which is thoroughly reliable in operation at high speeds. Toward these ends the machine is provided with a single rotary shaft which is journalled in the upper portion of the frame and extends from a point exterior of the vertical standard, adjacent its top, to a point within the needle head carried by the overhanging arm. This shaft is arranged to drive a reciprocable needle bar and also various instrumentalities in the base. These include one or more loopers ofthe 4-motion type and a feed dog of the 4-motion type.

A further object has been to provide a chain stitch sewing machine of the flat-bed type, and more especially a closely coupled machine having a short base and short overhanging arm, adapted to sew edge seams, the mechanism'being capable of effecting the desired stitching at high speeds with minimum vibration and quiet operation. 7

An important feature of the invention is the provision of an improved looper construction with connections from the single rotary shaft, mentioned above, for imparting both loop-taking and shedding movements and needle avoid movements to the loopers. a e f 7 Another feature of the'invention is the provision of a hollow frame for housing the various operative devices of the machine and the provision of means for effecting automatic lubrication of these devices whenever the machine is in operation.

A specific improvement forming part of the present invention is the provision, in a flat bed machine having a simple frame construction of the type above indicated, of a single rocker member driven from therotary shaft in the upper arm and connected with the feed dog and the loopers in the base to impart the feed .strokeand looper avoid movements to these parts, respectively. A particular feature of thispart of the construction is the provision for separateadjustment of the feed stroke and thelooperavoid movement imparted upon the rocking of the single rocker member. Thus provision is madenot only for varying the stitch length but also for adjusting the looper avoid movement to compensate for v different thicknesses of loopers or needles,

9 Claims. (Cl. 112-256) Still another feature of the invention is the provision of means for increasing the permissible speed of operation of the machine by constantly removing heat from the interior of the frame and thereby maintaining the various operating devices at a relatively low temperature during operation of the machine. chine is equipped with an individual driving motor and clutch adapted 'notonly to drive the sewing machine but to drive also a blower arranged to maintain a constant suction upon the space within the frame of the machine. Thus, as the machine is operated there is a continuous withdrawal of warm air and a continuous influx of cooler air. This is accomplished, moreover, in such a way as to reduce to a minimum the loss of lubricant in the air withdrawn from the frame.

Other objects, features, and advantages of the invention will appearfrom the detailed description of an illustrative form of the invention which will now be given in conjunction with the accompanying drawings in which:

Figure I is a view, partly in front elevation and partly in longitudinal vertical section through a combined sewing machine and driving unit therefor mounted'on a table, shown only in part.

Figure II is an enlarged longitudinal vertical section through the sewing machine illustrated in Figure I.

Figure III is a further enlarged view in horizontal section through the base of the machine taken at substantially the elevation indicated by the line III-III in Figure II.

Figure IV is a similarly-enlarged horizontal section through the base of the machine taken substantially along the plane indicated by the line IV-IV in Figure II.

Figure V is an enlarged vertical section through the base andstandard of the machine, taken substantially along the broken line V-V in Figure I.

Figure VI is a view, partly in end elevation and partly in vertical section, taken substantially along the broken line VIVI ofFigure I, the end cover plate of the needle head being removed to disclose the parts within said head.

Figure VII is an enlarged detail view in vertical section through one of the splash plates and is taken along the line VII.VII of Figure V; and

Figure VIII is a detail view in transverse section showing a modified form .of feed bar and associated wall opening which may be employed.

Referring now to the drawings and more particularly to Figure I, the improved construction embodying the present invention'has been illustrated as applied to a sewing machine, designated generally by the reference numeral H).

For this purpose the majecting from the frame of the motor and clutch unit is normally rocked in a clockwise direction (Figure I) by a spring i9 and serves to hold-the shaft 16 toward the right i. .e., in a position in which the clutch is disengagedfW hen it isde sired to operate the sewing machine the lever I! may be rocked in a counterclockwise direction by I suitable connections from afoot'treadle-or"knee' control member (not shown). A pulleyJfl-secured to the shaft l6 and driven by the latter whenever the .clutchis engaged is connected-by a beit- 2} 'witha combined handwheel and pulley 22- secured to amainoperating "shaft 23 which constitutes the=.only"rbtary shaft in the sewing machine. For furtherfdetails as; tothe' construc-' tion, mounting, and operation of! the electric transmitter reference may be had to thepending application of Geo'rge Sauer, SerialQ'No. 442,585, filed on May 12; 1942, now Patent Number 2,418,429 dated Apia-1,1947. v h

Turning now to theconstruction of the sewing machine, this comprisesahollowo f-rame which serves to support and substantially completely enclcse'the operating -mechanism of the machine. This frame, as illustrated, is of the flat-'bed'type and includes'a base portion 24 (Figures Land 1;;

II) ,a vertical standard-25- rising from one end of the base, and-a short overhanging-arm26 earrying-a-needle head-flat-its free end. The shaft His-supportedat; its right endKFigure II) by a bearing -bushing 23amounted in -a housing=2ii in the end wall of the verticalstandardadia centits top and is I journalled adjacent its forwardendin-a partition'ZQ winch-serves to divide the main-portion of the overhanging-arm from-the needle head. Wit-hi-n the needle head there-is secured to the shaft 23abal-anced crank member as carrying a -crank pin 3 l which-:isconnected b a pit-man or link 32 with a block33 secured to a needle bar-34. At-i-tslower endthe needle bar-carriesnneormore needles 35 (two'being show-n), adapted to be reciprocated uponrrotation of the shaft 23. The *points of the needles are carried froma position some distance above'the work supporting--surfa;ce- 36=of the base to and through aathroatvplatet'l mounted the-work support.

Beneath the throat-plate'there"'is provided a pair of lowers-"38- adapted to cooperate with the needle thread loops formed-asthe needles startto rise from-their-lowermost positions; 'These loopers -are carried by a ro'd'39 which 'ismounted for axial reciprocation in airock' frame dfi sccured to'a rock shaft-4|. This. shaft is mounted in suitable bearings and-"43 carried by integral portions 'of the-base of 'the' frame. 'Loop taking and loop shedding movements are imparted -to theleopers =by'r'ecip'robation 0f the *rod- 39, while needle-avoid movements are given to the loopers by the rocking of the frame-49. These movements are derived-from the shaft 23 bysuitable'connections-whi'ch will-now be described. -=A crank portion of-the sha'ft 23 is connected by -a''pitman d5 with a ballformation adjacent the'end of an arm 46 "ofa robk member-securedto a shaft ll'journa-lled in the vertical standard 25' A downwardly extending arm 48 of the rock memher is connected by a pitman or link 49 with a ball ended stud 50 carried by the looper carrying rod 38. It will be seen that through these connections reciprocations will be imparted to the rod 38 as the shaft 23 is rotated.

An eccentric 5L carried by the-shaft 23 (Figurelb coeperates with a strap 52 h; the upper end of a link or pitman 53 which is connected at its lower end, by a ball and strap construction, with an arm 54 forming part of a rock member anhunted on a shaft 55 (Figures III and V) suitably a jzournalled inlportions 56 and 51 of the frame. "A downwardly extending arm 58 of the rock memberis-connected by a link 59 with a stud 6t projecting from the rock frame 60. Link 59 is connected with thearm 53 by means of a bolt or screwfii cooperating with an arcuate slot 62 in the arm. This permits adjustment of the bolt 6I,-to any desired positionwithinthe slot 62300 vary the extent of the "rocking movement: i'mpai'ted'to" the ro kmrame w. 1

Another arm tsrormingpart of the rock membei 'moimted on thet'snanfiss isi'connected'ibybn extensible .l'in'k 64 with anem a!) secured to'a hollow" ShaftSB suitably 'jour'nalle'd 'i'n" thebas'e of the machine frame.- Arm-63. is provided with art elongated arc'uate 'slot"6|'cooperating' with a bolt type ball "studlfiafiby-whichthe link-1611s connected through aballarid'strap with the arm, thereby permittingadjustmntiof'this connection as desired As will belpresen'tly explained, the rocking of the shah fififibythe' connections. just described, serves to impart the' feed and return movements toithefeeddog. "It will be apparent, therefore, that adjustment of the -stud 68 within the slot 81- serves to vary the length of the stitch to be formed.

'Referring now =to7'Figures 'III and VI, there is upwardly extending arms serving to spivotally support, at tlsieir upper ends, --oneend-of a feed bar. This feed bar isl preferably l formed two sections, lfl and-lfl'c connected 'together'by a .bar or rod-like extension-1 l :ef-the-part= Hia, this extension beingof -reduced-diameteradapted to pass through anopening12- in-a-wall=l3 of the base -ofthef-rame. -'I he-overall-length-=of the bar may be variedby adjusting the position of the member -1ll-in-relation-to extension 7|. Set screws "I la serve'to hold thee-parts inassembled relation. Opening: l2 isslightlyelongated in a vertical direction to permit the necessary lifting and lowering movements of -thefeed-bar. Ad iacent its forward end-the-feed bar-carries a feed dog l4-which-is adjustably 'secured to the forward member of -the bar by-means of arscrew l5 cooperating withen eiongated slot 76 in the feed dog. A downwardly and forwardly extending portionll of the- 'feed bar -has its forward end pivotally COfiIlBCtBdiWi-thVB/ link '18' which, I at its 'opposite end is connected with an 'a'rm E9 secured to a shaft'Bfl. Shaft-BU, as best'shown in Figures: II and lvp is mounted insuitable' bearingsi carried by the-' basgbf the framefone of thesefbearings being modnted-inawall- M of the frame formingv part 'of the Iubr-icant retaining housing and disposed' at' iight angles to the wall 13. the 'enclosed portion of T the frame there issecured to the 'shaft il 0 an arm ti which is connected =at' its f-ree -e'nd by 'link' or pitman 83' with a? strap 84 eeocer atifig-;w1th an eccentric SE-secured to theshaft 23. It will be'apparent that through me -"connections just de'scribed; -lifting and loweringnibvements will be imparted-"to the feed bar and the feed dog, while longitudinal movements, for feed and return strokes of the feed dog, will be given to the bar by the rocker 69 as the shaft 66 is rocked, through the connections described, by the eccentric 5|.

Cooperating with the feed dog to advance the work over the work supporting surface is a presser foot 85, of any suitable construction, mounted upon the lower end of a presser bar 86 which is slidable vertically in the needle head. At its upper end the bar 86 carries a flanged, thimble-like member 86a which is engaged by the forked end of a leaf spring 81 (Figures II and VI) which extends substantially the full length of the overhanging arm 26 just beneath the top of the latter. The spring 81 extends through an opening in the wall 29 and at its opposite end is apertured to receive a retaining stud 88 carried by a boss 89 extending inwardly from the rear wall of the machine frame. Intermediate its ends the spring is engaged by a flange 90 formed on a screw 9| adjustably engaged with a lug 92 on the frame. It will be apparent that the tension of the spring 81 may be varied, as desired, by appropriate adjustment of the screw 91. For the purpose of lifting the presser bar, to enable free shifting of the work, an arm 93 secured to a hollow shaft 94 is provided. A spring 95 normally urges the arm 93 in a clockwise direction (Figure VI) to a position in which clearance is provided between the upper surface of the arm and the lower surface of a block 96 secured to the presser bar. Shaft 94 extends longitudinally of the overhanging arm 26 and is suitably journalled in the frame. Its innermost end is journalled in a lug 91 projecting inwardly from the rear wall of the arm at the top of the vertical standard. This lug has an opening 98 extending outwardly from the shaft to the outer rear surface of the frame. An arm 99 secured to the shaft extends through the opening 98 to the outside of the frame and constitutes the means for rocking the shaft at will. A chain or other suitable connection may be provided from the end of the arm to a foot treadle or knee-controlled member (not shown). It will be apparent that as the arm is depressed (Figure VI) and the shaft 94 is rocked counter-clockwise, arm 93 will engage the block 96 to lift the presser bar and the presser foot.

The interior of the frame, between the partition member 29 in the overhanging arm and the walls 13 and 8| in the base, constitutes a substantially oiltight and dusttight compartment for housing the various operating parts hereinbefore described. Provision is made for dispersing lubricant I09, which is held in a reservoir provided in the base, in the form of a mist of fine lubricant particles which are distributed throughout the hollow of the frame. The means for so dispersing the oil comprises a pair of plate-like members Ilil and'l02, best shown in Figures II, III, IV, V, and VII, which are secured to the hollow shaft 80. These members are long and flat and are oscillated through the oil upon the rocking of the shaft 80. They are each provided with a series of indentations I 03 on each face, these indentations having the general contour indicated in Figure V and a cross-section such as indicated in Figure VII. Abrupt shoulders are provided at the straight bottom edges of the indentations but gradual slopes are provided at the tops and ends. Thus, the form of the indentations is such thatas they are carried downwardly into the lubricant, upon the rapid'oscillation of the plates, they will have relatively slight splashing effect, but as they are carried upwardly they will pick up a small amount of oil and will throw it upwardly into the standard, thus creating the desired lubricant mist. The two plates may be of identical construction but preferably have the hubs or collars by which they are attached to the shaft on opposite sides, as shown. They are preferably. secured to the shaft by means of set screws I04 (see Figure IV).

It will be understood that the lubricant mist will be distributed over the various relatively sliding surfaces and effect thorough lubrication of the parts. In addition to reaching the surfaces of the various eccentrics and straps and the'connections between the various pitmans or links and the rock members, or the like, a portion of the lubricant will be collected in a small pocket I05 provided adjacent the top of the frame (Figure II) from which it will be supplied through an opening 585 to the bearing surface which supports the shaft 23 in the end Wall of the standard. Excess lubricant seeking to escape from this bearing will be returned through a duct N11 to th supply in the base. Some of the mist will be collected in an open pocket Hi8 formed in the top of the rock shaft 84 intermediate its ends. This lubricant will be delivered through the bore of the shaft into the needle head where it will accumulate in a small reservoir I09. Any excess lubricant so delivered will be returned to the main reservoir in the base through a duct i it passing through the lower wall of the overhanging arm. Within the needle head the lubricant will be whipped into a spray by the scoop-like extension 3 2a at the lower end of the link 32. This scoop is carried into and through the lubricant in the reservoir ills upon each cycle of the machine.

Lubricant may be introduced into the machine through a normally closed opening ill in the needle head, or a similar opening H2 in the top of the overhanging arm in the region of the vertical standard. Various expedients may be adopted for facilitating the lubrication of the relatively sliding surfaces in the base. For example, the inner bearing 43 for the shaft 4! may be supplied with a portion of the dispersed lubricant which is collected and delivered through the opening its into the center of the bearing.

As best shown in Figures II, III, IV, and VI, the loopers and the feed dog are located outside of the lubricant retaining portion of the frame. This is to render these parts readily accessible and also to avoid the danger of throwing lubricant onto the work or the stitching threads. However, the means for operating the loopers and the feed dog are, as far as possible, placed within the enclosed portion of the housing. The

shaft 39 which operates the feed dog lifting link is passes through a wall of the enclosure and the bearing surfaces of the link it are the only relatively sliding surfaces which are outside of the range of the lubricating mist. As previously indicated, a slightly enlarged opening 12 is provided for the passage of the feed bar H to enable the latter to be lifted and lowered in the manner required, as weil as shifted longitudinally. A similarly enlarged opening H4, Figure VI, is provided to permit the horizontal or lateral movement of the looper carrying rod 39 as the latter is given its needle-avoid movements. A small amount of lubricant may escape through the openings 12 and l is around the respective bars but this is not'suflicient to do anyserious' harm.

masseuse:

Hhwevergifsittis desiredrto completely eliminatei thissleakage otthexluhricanlsraz' number-:01 sealsing' Washers, L; may: beaprovidedi aroundx'the' IBdllDBdLCOHHECtiIIg I'Qdi 1510f the:- feed bar and urged byrassprringzlili against the-1.3;. This arrangement; isswsuchz. that the: washers: do not interferez with: the various: movements imparted to .the feed .bar, but at. the 3S ameztimethey, provide: an efiectiveesealrforrth opening, 72;, A, similar; arrangement; includingqwashersii H andtaspring H8 may be provided with respect to thezlooper: carrying b er. 3 9.

In. lieu oil the. sealing: arrangement above described,:,one;or both: of. the. bars 39 and?! may berma-de: square in: cross-section and may be. passed; through: slightly elongated: openings. in the respective walls; to permit the necessary movements-ofthebar. This permitsaalslight reduction-inthecrossesectional. area of: the openings. through which. the lubricant. may; escape. An arrangement of; this character isillustrated in Figuretvlllin whichtliefeedzbar H b isshown as; of. square. crossesectioni and the; opening: 72a. is; shown as. of rectangular cross.-section;..

Toprovide access tothe interior of the enclosed housing; and particularly to; enableadiustment: of the connections B33 and; 63; a large removable screw plug; liilsise provided. in thewall 8-1, as shown; in Figures 111: and .VI.

Eonthe purpose. of dissipating-italic heat generated within;thexhollowframe due-tothe high speed operationtof the machine, means are. providedfor continuously: withdrawing the: heated airJfrom. the. interior. of i the. frame. This means comprisesia suction blower: 12%. whichtmay suitably. secured by Wing bolts I22 to a plate I23 which is: adjustably: connected with. the frame? of the transmitter unit by a seriesizof'bolts. I24. A rotor. member. l25..-of. the blower. may. be: secured to the hub ofithe pulley .210 or to the shaft l5. For

further detailsas to this construction, reference 1 maybe had to said pending Sauer application, The-blower housing; however, is ofslightly different construction and is provided: witli=a central opening having an outwardly projecting. collar [Ziifadapted to. receive a frust'oconical i connector I I2? provided at'theend of a conduit I28; This conduit is connected, through. a coupling I29," with another conduit itewhich passes-upwardly throughanopening ['31 inthe table and which may be clamped in desired position-bv'any-suitable clampingmeans [32-2 The upper endof the conduit I issuitably connected with. anoutwardly projecting collar: surrounding an opening 133 in the rear- Wall of the overhanging arm of the sewing machine frame. Throughthe con-- duits described the interior of the. sewing machine framewill be subjected to suction :or partial 'vacuurn-continuously during the operationofsfthe machine. This suction action is transmitted to the needle head through theopening in the wallv 2'9 throughwhichspring 81 extends; To create an adequate :suction action upon the frame the cornduits 1'28: and I30and=the associated passages should be'of reasonably large diameter; i; e., about Air. will leakinto the frame of the machine to replace the; air withdrawn, aroundithe various shafts andxbarsawhich pass through the walls of the frame. It will also enter-in partlthroughfthe passage; .10]; If; desired; other. openings-'may-sbe specially; provided in the; wallseofzthexframee to admit air; one; such. opening; providedi-witln a1 screened air filterr'unitl. is indicated at; 33110111! Figure: 1. Such: openings should: be: so: located as tominimize. the dangerof escape: ofithelubricant mist, The maintenanceioha slightlyreducect pressure. within the frame. will aid inypreventing the. discharge. of the'lubricantl mistthroughzany, openings other than the-opening] 33.

. Any suitable threadzhandling iandcontrolling;

; devices-may be employedin;connectiomwithboth theneedle threads andthe loopen threads. As. shown in: Figure VI; these devices: may; suitably, include :thread tensioning means; likmounted on? thefront wallof the-verticalistandardz The take up. means. fortherneedle threadszmay includezam arm; i35 shownonly in part-.in-.Fi'gure-VI,. which. isv secured to the needleibar; and.- which; projects: through therfront face; of; the :needle .head to-en-.- gage and act upontheneedlethreads in a-manner; well known inthe art. Thelooper-threads may;' be subjected to the; take-up-action-ofi a: swingable; arm; I 36 cooperating with azfixedguide: I31: (Rig-- ureVI). Arm" is;secured:-to. the-end ofithe: shaft 4?, as best'shownriniFigure V; andrpartakez of the rocking: movements ofzthe-latterrimparted:

by the crank ii. in the'manner hereinabove. explained.

It isbelieved that thetoperationiof thsrmachine will befullyunderstood fromr-therforegoing dc tailed description of! thesvarious: parts.- It'may bebri-efiy summarizedasfollows: The worlrzto; be stitched is inserted betweenrthe presserr foot: and thethroat: plate; byzli'fting the resser foot through the operaticnzofthe arm-r99. As above. indicated. the machine-is particularlyzintendedfor: the formation of seams. along the edges-of i work: pieces. Accordingly, very little 1 space is required betweenthe needle bar-andthewventical standard.- This space'need besufficientzonly tolprovidezfreea dean of movementfor therhand-ofzthe operator-in introducing the work beneath the'pressenfoot, in. the manner set forth, and the-subsequent'manipue lation of the work;

The work piece. having b'eenirproperly introduced the machine is-set into-operation by-i'rock ing-the control lever -l l which :causeseengagement of theclutch of; the electric-transmitter: unit; This not only brings about operation-ofithe :sewing machine-but also the rotor! of-the blower 128.; Operation of the latter serves top-withdraw. the heated air from the interior of the-sewing machineframe and permits a desirable influx of cooler air through clearance. spaces; and. otherpassages providedthroughlthesframei All "of the functions of the sewing; machine are performed by; "suitable driving connections from the single. rotary shaft cXtending'longitudinahy ofthe upper arm; Variouseccentric means onthis main drive shaft serve to perform: a variety of. functions; such as reciprocation: of? themeedlef bar -84- andof: the looper carrying; bar-3'9. Eccentric means also serveto impart needle-avoid movements-to the leaner carryingmar; by: the ro'cking of theframe as in: which the baris: slidably mounted, and toimpart the-longitudinal feed strokemovements-to-the-feed bar In; lflmaswell asthe lifting and loweringmovenients of theforward end of-tlie -bar:to producethe' desiredrfourmotion operation :of. thefeeddog M; For. accomplishing-the :five separate movements of the" stitch forming and: work-1; feeding} devices mentioned above, only four separate eccentric meansareproivided on theshaft: 23: Separatelyadjustable connectionsare; provided from one r'Of. these.- to two; devices operated.- byyit. Lubrication of: the

various operating parts of the machine is accomplished by the oscillation, at highspeed, of a pair of plates NH. and I02 secured to the rock shaft 89 which imparts thelifting and lowering movements to the feed dog. These plates serve to disperse the lubricant, retained in the base of the hollow frame, as a fine mist throughout the interior of the-frame. -Some of this lubricant is delivered to the needle head wherein it is'also whipped into a mist by the action of the scoop 32a at the lower end of the needle bar actuating link 32.

While an illustrative embodiment of the invention has been described in considerable detail, it will be understood that numerous changes may be made in the construction and arrangement of the various parts without departing from the general principles and scope of the invention.

1. In a sewing machine having a frame including a base having an enclosed portion, a. hollow vertical standard communicating with said enclosed portion of the base, and an overhanging arm terminating in a needle head, a reciprocable needle bar in said needle head, a looper in an unenclosed portion of said base, an elongated slide member carrying-said looper and extending from the enclosed to the unenclosed portion of the base, a rock frame within the enclosed portion of the base by which said member is slidably carried and shifted bodily in a direction transverse to its sliding movement, work feeding devices in said base, a rotary shaft mounted in said overhanging arm and extending from a point outside of said standard to a point within said needle head, connections from said shaft in said needle head for reciprocating said needle bar, eccentric means on said shaft in the region of said standard, and connections from said eccentric means located within said standard and the enclosed portion of the base for reciprocating said slide member, rocking said rock frame and operating said work feeding devices.

2. In a sewing machine having a frame including a base having an enclosed portion, a hollow vertical standard communicating with said enclosed portion of the base and an overhanging arm terminating in a needle head, a reciprocable needle bar in said needle head,; a looper in an unenclosed portion of said base, an elongated slide member carrying said looper and extending from the enclosed to the unenclosed portion of the base, a rock frame within the enclosed portion of the base in which said member is slidable and by which it is carried bodily in a direction transverse to its sliding movement, work feeding devices in i head for reciprocating said needle bar, eccentric means on said shaft in the region of said standard, and connections from said eccentric means located within said standard and the enclosed portion of the base for reciprocating said slide member, rocking said rock frame and operating said work feeding devices, said last mentioned connections including a common member driven by a single eccentric for rocking said rock frame and operating said work feeding devices.

3. In a sewing machine having a hollow frame including a base with a fiat work supporting surface, a vertical standard and an overhanging arm in open communication and providing an enclosed lubricant retaining housing, a needle head at the end of said arm, a rotary shaft extending 10 longitudinally of said arm," areciprocable needle bar in said head, and complementary stitch forming devices and work feeding. means in said base, the combination therewith of connections from said rotary shaft comprising a plurality of eccentrics thereon and a'plurality of non-rotary members driven'ztherebyfor operating said needle "bar, said devices and said means, said connections comprising an oscillatory member, said base having a lubricant reservoir formed therein extending beneath said work supporting surface to a point near said devices, plate like means carried by said oscillatory member and extending constantly below the lubricant level in said reservoir for distributing lubricant as a mist throughout said hollow frame, means for delivering a portion 'of said distributed lubricant to said needle head, and means in said needle head for dispersing said lubricant throughout said head.

4. In a sewing machine having a hollow frame including a base with a fiat work supporting surface, a. vertical standard and an overhanging vto a point near said devices, and rockable platelike means associated withand driven by at least one of said non-rotary members of said connections for distributing lubricant as a mist throughout said hollow frame, said plate-like means having a portion extending constantly below the lubricant level in said reservoir.

. '5; In a sewing machine having a hollow frame including a base with a flat work-supporting surface, a vertical standard-and an overhanging arm in open communication and providing an enclosed lubricant retaining housing, a needle head at the end of said arm,-a rotary shaft extending longitudinally of saidarm, a reciprocable needle bar in said head, and complementary stitch forming devices and work feeding means in said base, the combination therewith of connections from said rotary shaft comprising a plurality of nonrotary members driven thereby for operating said needle bar, said devices and said means, said base having a lubricant reservoir formed therein extending beneath said work supporting surface to a point near said devices, and rockable platelike means associated with and driven by at least one of said non-rotary members of said connections for distributing lubricant as a mist throughout said hollow frame, said plate-like means having formations in the surfaces thereof presenting only upwardly-facing abrupt shoulders and having a, portion extending constantly below the lubricant level in said reservoir.

6. In a Sewing machine having a hollow frame including a base, a vertical standard and an overhanging arm in open communication, a needle head at the end of said arm having an enclosed chamber in communication with the hollow of said frame, a rotary shaft extending longitudinally of said arm, a reciprocable needle bar in said head, complementary stitch forming devices and work feeding means in said base, and connections from said rotary shaft for operating said needlebar, said 

